{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758246180",
    "entityType": "Track",
    "nonce": "0xa057673c26e2ee553cd37f9561bde400a0c8f81a9710be6430ae9846477eadd8",
    "signature": "0xc76ef6de2961a3ea1ceba8b27a16fd76e4aef5689be7e3f2f22ec2098b7fb40e696ab05be75ea28c2681025ff8ba2f0524eb6b1ab1de009995609c58448adfbe1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}